CN117124905A - Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion - Google Patents
Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion Download PDFInfo
- Publication number
- CN117124905A CN117124905A CN202311107529.9A CN202311107529A CN117124905A CN 117124905 A CN117124905 A CN 117124905A CN 202311107529 A CN202311107529 A CN 202311107529A CN 117124905 A CN117124905 A CN 117124905A
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- inlet
- outlet
- ammonia
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 208
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 208
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 199
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 190
- 239000000446 fuel Substances 0.000 claims abstract description 93
- 238000010248 power generation Methods 0.000 claims abstract description 79
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 66
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims description 22
- 230000008020 evaporation Effects 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 20
- 238000011049 filling Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 16
- 229910052744 lithium Inorganic materials 0.000 claims description 16
- 238000004146 energy storage Methods 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 11
- 239000002826 coolant Substances 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/54—Fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/57—Charging stations without connection to power networks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention belongs to the technical field of electric vehicle charging piles, and relates to an off-grid electric vehicle charging pile based on ammonia-hydrogen conversion, which comprises an ammonia decomposition hydrogen production system, a hydrogen fuel power generation system and an electric vehicle charging system, wherein the fuel of a fuel cell is supplied by using an ammonia decomposition hydrogen production method, and the off-grid electric vehicle charging pile has the characteristics of low cost and mature transportation technology; the hydrogen fuel cell is used for generating electricity to supply the electric energy to the charging pile system, and the charging pile system has the characteristics of zero pollution and zero carbon emission; the electric vehicle charging is not limited by the coverage of the power grid in remote areas or areas where the power grid is not easy to reach, so that the influence of inconvenience in charging on the whole popularization of the electric vehicle is avoided; meanwhile, the invention fundamentally avoids the use of traditional fossil energy and carbon emission.
Description
Technical Field
The invention belongs to the technical field of electric vehicle charging piles, and relates to an off-grid electric vehicle charging pile based on ammonia-hydrogen conversion.
Background
The electric automobile uses electric energy as driving force, can effectively reduce the use of fossil fuel, is popular in the whole country, and is favored by wide users. The existing energy supply of the electric automobile comes from the charging pile, so the electric energy supply mode of the charging pile is particularly important. The traditional charging pile is powered by the power grid directly, however, in remote areas or areas where the power grid is not easy to reach, the use of the charging pile is greatly limited, so that the electric automobile cannot be widely applied to the areas, and the whole popularization of the electric automobile is greatly influenced.
Therefore, there is a need for a charging pile that can charge an automobile without direct power from a power grid, solving the above-mentioned problems.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: off-grid electric vehicle charging pile based on ammonia-hydrogen conversion, comprising: the system comprises an ammonia decomposition hydrogen production system, a hydrogen fuel power generation system and an electric vehicle charging system, wherein the ammonia decomposition hydrogen production system is used for decomposing liquid ammonia into hydrogen for power generation of the hydrogen fuel power generation system; the hydrogen fuel power generation system is used for generating electricity from the hydrogen generated by the ammonia decomposition hydrogen production system and providing the generated electricity to the electric vehicle charging system; the electric vehicle charging system is used for matching the voltage stabilization of the electric energy provided by the hydrogen fuel power generation system and outputting the electric energy to the electric vehicle for charging;
the ammonia decomposition hydrogen production system comprises: the device comprises a liquid ammonia storage tank, a liquid ammonia pump, an ammonia decomposition reactor, a TSA device, a PSA device, a connecting storage tank, a hydrogen filling device, a hydrogen compression pump and a hydrogen storage tank, wherein the ammonia decomposition reactor is used for generating hydrogen after the reaction and decomposition of ammonia; the liquid ammonia outlet of the liquid ammonia storage tank is connected to the inlet of the liquid ammonia pump, the outlet of the liquid ammonia pump is connected to the ammonia decomposition inlet of the ammonia decomposition reactor after passing through the evaporation heat exchange device, the hydrogen outlet of the ammonia decomposition reactor is sequentially connected to the hydrogen inlets of the TSA device and the PSA device after passing through the heat exchange condensing device, the hydrogen outlet of the PSA device is connected to the hydrogen inlet of the storage tank, the hydrogen outlet of the storage tank is connected to the hydrogen inlet of the hydrogen filling device after passing through the cooling condensing device, and the hydrogen outlet of the hydrogen filling device is connected to the hydrogen inlet of the hydrogen storage tank after passing through the hydrogen compression pump in series; the ammonia decomposition hydrogen production system converts liquid ammonia into gaseous ammonia after evaporation and heat exchange to decompose in an ammonia decomposition reactor to generate hydrogen, and conveys the hydrogen to a hydrogen storage tank for generating electricity after heat exchange, condensation and compression;
the hydrogen fuel power generation system includes: the device comprises a hydrogen storage tank, a fuel cell power generation stack, an air compressor, a filter and a DC-DC converter, wherein the fuel cell power generation stack is used for generating electricity after burning hydrogen; the hydrogen outlet of the hydrogen storage tank is connected to the hydrogen inlet of the fuel cell power generation stack, the air inlet of the fuel cell power generation stack is also connected with the air outlet of the air compressor, the air inlet of the air compressor is connected to the air outlet of the filter, the air inlet of the filter is communicated to an external air source, and the power generation output port of the fuel cell power generation stack is electrically connected to the DC-DC converter; the hydrogen fuel power generation system transmits hydrogen stored in the hydrogen storage tank to the fuel cell power generation stack, the filter and the air compressor to filter oxygen in compressed air for combustion and then generate power, and the fuel cell power generation stack outputs the generated power through the DC-DC converter;
the electric vehicle charging system includes: the lithium battery energy storage device comprises a DC-DC converter, a lithium battery energy storage device and a charging pile; the electric output port of the DC-DC converter is electrically connected to the lithium battery energy storage device, the lithium battery energy storage device is electrically connected to the charging pile, and the charging pile is provided with a charging gun head for charging the electric vehicle; the output electric energy of the DC-DC converter is stored in a lithium battery energy storage device or is used for charging the electric vehicle through a charging pile.
Preferably, the evaporation heat exchange device between the outlet of the liquid ammonia pump and the ammonia decomposition reactor comprises a second evaporator and a heat exchanger, wherein the outlet of the liquid ammonia pump is connected to the evaporation inlet of the second evaporator, the evaporation outlet of the second evaporator is connected to the heat absorption inlet of the heat exchanger, and the heat absorption outlet of the heat exchanger is connected to the ammonia inlet of the ammonia decomposition reactor; the heat exchange condensing device between the hydrogen outlet of the ammonia decomposition reactor and the TSA device is a heat exchanger and a second evaporator respectively, the hydrogen outlet of the ammonia decomposition reactor is connected to the heat radiation inlet of the heat exchanger, the heat radiation outlet of the heat exchanger is connected to the condensing inlet of the second evaporator, and the condensing outlet of the second evaporator is connected to the hydrogen inlet of the TSA device; the second evaporator and the heat exchanger supply the heat absorbed by the evaporation and heat exchange of the liquid ammonia by the hydrogen generated by the decomposition of the ammonia decomposition reactor through heat dissipation and condensation, so that the endothermic reaction of the gasification of the liquid ammonia and the exothermic reaction of the cooling of the hydrogen are matched with each other, the energy is saved, the heat loss is reduced, and the hydrogen production efficiency is improved.
More preferably, an air cooler is further connected in series between the heat radiation outlet of the heat exchanger and the condensation inlet of the second evaporator, and a second compressor is further connected in series between the condensation outlet of the second evaporator and the hydrogen inlet of the TSA device.
Preferably, a stop valve is further connected in series between the liquid ammonia output port of the liquid ammonia storage tank and the inlet of the liquid ammonia pump, the outlet of the stop valve is further connected with a first evaporator, the outlet of the stop valve is connected to the evaporation inlet of the first evaporator, the evaporation outlet of the first evaporator is connected to the inlet of the first compressor, the outlet of the first compressor is connected to the inlet of the liquid ammonia storage tank, the cooling condensing equipment between the hydrogen outlet of the storage tank and the hydrogen inlet of the hydrogen filling device is an absorption refrigerating device and the first evaporator, the hydrogen outlet of the storage tank is connected to the inlet of the absorption refrigerating device, the outlet of the absorption refrigerating device is connected to the condensation inlet of the first evaporator, and the condensation outlet of the first evaporator is connected to the hydrogen inlet of the hydrogen filling device; the first evaporator is used for recovering the redundant liquid ammonia from the liquid ammonia output port of the liquid ammonia storage tank to the inlet of the liquid ammonia pump and simultaneously providing a low-temperature source for cooling and condensing hydrogen, so that the redundant liquid ammonia in the pipeline is recovered while energy consumption caused by cooling and condensing is avoided.
More preferably, a throttling device is connected in series between the hydrogen outlet of the connecting storage tank and the inlet of the absorption refrigeration device.
Preferably, the connecting storage tank is respectively provided with a high-pressure storage tank, a medium-pressure storage tank and a low-pressure storage tank.
Preferably, a pressure regulating valve is connected in series between the hydrogen outlet of the hydrogen storage tank and the hydrogen inlet of the fuel cell power generation stack, an exhaust valve is further arranged on the fuel cell power generation stack, a circulating pump is further arranged between the inlet of the exhaust valve and the pressure regulating valve, and the circulating direction of the circulating pump is from the exhaust valve to the pressure regulating valve.
Preferably, the fuel cell power generation stack is further provided with a cooler and a coolant pump, an inlet of the cooler is connected to the fuel cell power generation stack, an outlet of the cooler is connected to an inlet of the coolant pump, and an outlet of the coolant pump is connected back to the fuel cell power generation stack; the cooler is used for cooling the fuel cell power generation stack and preventing the fuel cell power generation stack from overheating due to long-time combustion.
Preferably, the fuel cell power generation stack is also provided with a warmer, an air inlet of the fuel cell power generation stack is connected to a warming outlet of the warmer, and a warming inlet of the warmer is connected to an air outlet of the air compressor; the cooling inlet of the warmer is connected to the exhaust port of the fuel cell power generation stack, and the cooling outlet of the warmer is connected in series through the expander and then is connected with an exhaust valve; the warmer fully utilizes the heat discharged by the tail gas after the fuel cell power generation stack burns so as to initially heat the filtered and compressed oxygen in the air entering the fuel cell power generation stack.
Preferably, the charging pile is provided with at least two charging gun heads; the plurality of gun heads can simultaneously meet the charging of a plurality of electric vehicles.
The beneficial effects of the invention are as follows:
1. the invention supplies fuel to the fuel cell by utilizing the ammonia decomposition hydrogen production method, and has the characteristics of low cost and mature transportation technology.
2. The invention utilizes the hydrogen fuel cell to generate electricity to supply the electric energy to the charging pile system, and has the characteristics of zero pollution and zero carbon emission.
3. The invention radically avoids the use of traditional fossil energy and carbon emission in the whole process.
Drawings
Fig. 1 is a schematic diagram of an off-grid electric vehicle charging pile based on ammonia-hydrogen conversion.
1, a liquid ammonia storage tank; 2. a stop valve; 3. a first pressure reducing valve; 4. a first evaporator; 5. a first regulating valve; 6. a first compressor; 7. a condenser; 8. a liquid ammonia pump; 9. a second evaporator; 10. a second regulating valve; 11. a heat exchanger; 12. an ammonia decomposition reactor; 13. an air cooler; 14. a second compressor; 15. TSA means; 16. a PSA unit; 17. a third compressor; 18. a connecting storage tank; 19. a high pressure storage tank; 20. a medium pressure storage tank; 21. a low pressure storage tank; 22. a throttle device; 23. an absorption refrigeration device; 24. a hydrogen filler; 25. a hydrogen gas compression pump; 26. a hydrogen storage tank; 27. a second pressure reducing valve; 28. an exhaust valve; 29. a circulation pump; 30. a pressure regulating valve; 31. a cooler; 32. a coolant pump; 33. a fuel cell power generation stack; 34. a warmer; 35. an expander; 36. an air compressor; 37. an exhaust valve; 38. a filter; 39. a DC-DC converter; 40. a lithium battery energy storage device; 41. and (5) charging the pile.
Detailed Description
The following description of the related art will be made apparent to, and is not intended to limit the scope of, the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an off-grid electric vehicle charging pile based on ammonia-hydrogen conversion includes: the system comprises an ammonia decomposition hydrogen production system, a hydrogen fuel power generation system and an electric vehicle charging system, wherein the ammonia decomposition hydrogen production system is used for decomposing liquid ammonia into hydrogen for power generation of the hydrogen fuel power generation system; the hydrogen fuel power generation system is used for generating electricity from the hydrogen generated by the ammonia decomposition hydrogen production system and providing the generated electricity to the electric vehicle charging system; the electric vehicle charging system is used for matching the voltage stabilization of the electric energy provided by the hydrogen fuel power generation system and outputting the electric energy to the electric vehicle for charging;
the ammonia decomposition hydrogen production system comprises: the ammonia decomposition device comprises a liquid ammonia storage tank 1, a liquid ammonia pump 8, an ammonia decomposition reactor 12, a TSA device 15, a PSA device 16, a connecting storage tank 18, a hydrogen filling device 24, a hydrogen compression pump 25 and a hydrogen storage tank 26, wherein the ammonia decomposition reactor 12 is used for generating hydrogen after the reaction and decomposition of ammonia; the liquid ammonia output port of the liquid ammonia storage tank 1 is connected to the inlet of the liquid ammonia pump 8, the outlet of the liquid ammonia pump 8 is connected to the ammonia decomposition inlet of the ammonia decomposition reactor 12 after passing through the evaporation heat exchange device, the hydrogen outlet of the ammonia decomposition reactor 12 is sequentially connected to the hydrogen inlets of the TSA device 15 and the PSA device 16 after passing through the heat exchange condensing device, the hydrogen outlet of the PSA device 16 is connected to the hydrogen inlet of the connecting storage tank 18, the hydrogen outlet of the connecting storage tank 18 is connected to the hydrogen inlet of the hydrogen filling device 24 after passing through the cooling condensing device, and the hydrogen outlet of the hydrogen filling device 24 is connected to the hydrogen inlet of the hydrogen storage tank 26 after passing through the hydrogen compression pump 25 in series; the ammonia decomposition hydrogen production system converts liquid ammonia into gaseous ammonia after evaporation and heat exchange, decomposes the gaseous ammonia in the ammonia decomposition reactor 12 to generate hydrogen, and conveys the hydrogen to the hydrogen storage tank 26 for power generation after heat exchange, condensation and compression;
the hydrogen fuel power generation system includes: a hydrogen storage tank 26, a fuel cell power generation stack 33, an air compressor 36, a filter 38, and a DC-DC converter 39, the fuel cell power generation stack 33 being configured to burn hydrogen gas for power generation; the hydrogen outlet of the hydrogen storage tank 26 is connected to the hydrogen inlet of the fuel cell power generation stack 33, the air inlet of the fuel cell power generation stack 33 is also connected to the air outlet of the air compressor 36, the air inlet of the air compressor 36 is connected to the air outlet of the filter 38, the air inlet of the filter 38 is communicated to an external air source, and the power generation output port of the fuel cell power generation stack 33 is electrically connected to the DC-DC converter 39; the hydrogen fuel power generation system transmits the hydrogen stored in the hydrogen storage tank 26 to the fuel cell power generation stack 33, and generates power after the fuel cell power generation stack 33 outputs the generated power through the DC-DC converter 39 with the filter 38 and the air compressor 36 filtering oxygen in the compressed air;
the electric vehicle charging system includes: a DC-DC converter 39, a lithium battery energy storage device 40, and a charging pile 41; the electric output port of the DC-DC converter 39 is electrically connected to a lithium battery energy storage device 40, the lithium battery energy storage device 40 is electrically connected to a charging pile 41, and a charging gun head is arranged on the charging pile 41 to charge the electric vehicle; the output electrical energy of the DC-DC converter 39 is stored in a lithium battery energy storage device 40 or the electric vehicle is charged by a charging pile 41.
Further, the evaporation heat exchange device between the outlet of the liquid ammonia pump 8 and the ammonia decomposition reactor 12 comprises a second evaporator 9 and a heat exchanger 11, wherein the outlet of the liquid ammonia pump 8 is connected to the evaporation inlet of the second evaporator 9, the evaporation outlet of the second evaporator 9 is connected to the heat absorption inlet of the heat exchanger 11, and the heat absorption outlet of the heat exchanger 11 is connected to the ammonia inlet of the ammonia decomposition reactor 12; the heat exchange condensing devices between the hydrogen outlet of the ammonia decomposition reactor 12 and the TSA device 15 are respectively a heat exchanger 11 and a second evaporator 9, the hydrogen outlet of the ammonia decomposition reactor 12 is connected to the heat radiation inlet of the heat exchanger 11, the heat radiation outlet of the heat exchanger 11 is connected to the condensation inlet of the second evaporator 9, and the condensation outlet of the second evaporator 9 is connected to the hydrogen inlet of the TSA device 15; the second evaporator 9 and the heat exchanger 11 supply the heat absorbed by the evaporation and heat exchange of the liquid ammonia by the hydrogen generated by the decomposition of the ammonia decomposition reactor 12 through heat dissipation and condensation, so that the endothermic reaction of the liquid ammonia gasification and the exothermic reaction of the hydrogen cooling are matched with each other, the energy is saved, the heat loss is reduced, and the hydrogen production efficiency is improved.
Further, an air cooler 13 is connected in series between the heat dissipation outlet of the heat exchanger 11 and the condensation inlet of the second evaporator 9, and a second compressor 14 is connected in series between the condensation outlet of the second evaporator 9 and the hydrogen inlet of the TSA device 15.
Further, a stop valve 2 is further connected in series between the liquid ammonia output port of the liquid ammonia storage tank 1 and the inlet of the liquid ammonia pump 8, the outlet of the stop valve 2 is further connected with a first evaporator 4, the outlet of the stop valve 2 is connected to the evaporation inlet of the first evaporator 4, the evaporation outlet of the first evaporator 4 is connected to the inlet of the first compressor 6, the outlet of the first compressor 6 is connected to the inlet of the liquid ammonia storage tank 1, the cooling condensing device between the hydrogen outlet of the storage tank 18 and the hydrogen inlet of the hydrogen filling device 24 is an absorption refrigerating device 23 and the first evaporator 4, the hydrogen outlet of the storage tank 18 is connected to the inlet of the absorption refrigerating device 23, the outlet of the absorption refrigerating device 23 is connected to the condensation inlet of the first evaporator 4, and the condensation outlet of the first evaporator 4 is connected to the hydrogen inlet of the hydrogen filling device 24; the first evaporator 4 is used for recovering the redundant liquid ammonia from the liquid ammonia output port of the liquid ammonia storage tank 1 to the inlet of the liquid ammonia pump 8 and simultaneously provides a low-temperature source for cooling and condensing hydrogen, so that the redundant liquid ammonia in the pipeline is recovered while energy consumption caused by cooling and condensing is avoided.
Further, a throttling device 22 is connected in series between the hydrogen outlet of the connecting storage tank 18 and the inlet of the absorption refrigeration device 23.
Further, the connecting tank 18 is provided with a high-pressure tank 19, a medium-pressure tank 20 and a low-pressure tank 21, respectively.
Further, a pressure regulating valve 30 is connected in series between the hydrogen outlet of the hydrogen storage tank 26 and the hydrogen inlet of the fuel cell stack 33, an exhaust valve 28 is further provided on the fuel cell stack 33, a circulation pump 29 is further provided between the inlet of the exhaust valve 28 and the pressure regulating valve 30, and the circulation direction of the circulation pump 29 is from the exhaust valve 28 toward the pressure regulating valve 30.
Further, the fuel cell power generation stack 33 is further provided with a cooler 31 and a coolant pump 32, an inlet of the cooler 31 is connected to the fuel cell power generation stack 33, an outlet of the cooler 31 is connected to an inlet of the coolant pump 32, and an outlet of the coolant pump 32 is connected to the fuel cell power generation stack 33; the cooler 31 is used to cool down the fuel cell stack 33 and prevent the fuel cell stack 33 from overheating due to long-term combustion.
Further, a warmer 34 is further disposed on the fuel cell power generation stack 33, an air inlet of the fuel cell power generation stack 33 is connected to a warming outlet of the warmer 34, and a warming inlet of the warmer 34 is connected to an air outlet of the air compressor 36; the cooling inlet of the warmer 34 is connected to the exhaust port of the fuel cell power generation stack 33, and the cooling outlet of the warmer 34 is connected in series through the expander 35 and then is connected with the tail gas valve 37; the warmer 34 makes full use of the heat discharged from the exhaust gas after the combustion of the fuel cell stack 33 to primarily heat the oxygen filtered and compressed in the air entering the fuel cell stack 33.
Further, the charging pile 41 is provided with at least two charging gun heads; the plurality of gun heads can simultaneously meet the charging of a plurality of electric vehicles.
Examples
The embodiment provides an off-grid electric vehicle charging pile based on ammonia-hydrogen conversion, applies pure hydrogen to a system for generating power by a fuel cell and supplying electric energy to the electric vehicle charging pile, and provides operation principles and coupling mechanisms of all parts of the system. The charging pile mainly comprises an ammonia decomposition hydrogen production system, a hydrogen fuel power generation system and an electric vehicle charging system.
The on-site ammonia decomposition hydrogen production system mainly comprises a liquid ammonia storage tank 1, a stop valve 2, a first pressure reducing valve 3, a first evaporator 4, a first regulating valve 5, a first compressor 6, a condenser 7, a liquid ammonia pump 8, a second evaporator 9, an ammonia decomposition reactor 12, an air cooler 13, a TSA device 15, a PSA device 16, a connecting storage tank 18, a high-medium low pressure storage tank, a throttling device 22, an absorption refrigeration device 23 and a hydrogen filling device 24:
after the stop valve 2 is opened, liquid ammonia flows out of the liquid ammonia storage tank 1, enters the second evaporator 9 through the liquid ammonia pump 8, residual redundant liquid ammonia flows into the first evaporator 4 through the first pressure reducing valve 3 in a pressure reducing mode, is compressed through the first regulating valve 5 and the first compressor 6, flows into the condenser 7, and returns to the liquid ammonia storage tank 1 for recycling after being condensed.
After flowing through the second regulating valve 10, the liquid ammonia in the second evaporator 9 firstly enters the heat exchanger 11 for heat exchange, and then enters the ammonia decomposition reactor 12 for decomposition to generate hydrogen; the hydrogen generated by decomposition in the ammonia decomposition reactor 12 is returned to the heat exchanger 11 and the air cooler 13 for cooling and then returned to the second evaporator 9; the hydrogen in the second evaporator 9 flows through the second compressor 14 to be compressed to reach a certain pressure, then enters the TSA device 15 and the PSA16 device, and then enters three storage tanks of a high-pressure storage tank 19, a medium-pressure storage tank 20 and a low-pressure storage tank 21 in the connecting storage tank 18 through the third compressor 17. The hydrogen in the tank 18 and TSA device 15 passes through the throttling device 22 to the absorption refrigeration device 23 and then back to the first evaporator 4 where it is vaporized into the hydrogen filler 24.
The hydrogen fuel power generation system mainly comprises a hydrogen compression pump 25, a hydrogen storage tank 26, a second pressure reducing valve 27, a pressure regulating valve 30, a circulating pump 29, a fuel cell power generation stack 33, a cooling liquid pump 32, a cooler 31, a heater 34, a filter 38, an air compressor 36, an expander 35 and a tail gas valve 37:
the hydrogen gas obtained from the on-site ammonia decomposition hydrogen production system is compressed to a high pressure state by a hydrogen compression pump 25 and sent to a hydrogen storage tank 26 for storage as needed. When the fuel cell stack 33 operates to generate electricity, the second pressure reducing valve 27 releases the high-pressure hydrogen in the hydrogen storage tank 26, and the pressure regulating valve 30 and the circulation pump 29 are started to output the hydrogen pressure of the normal operation of the fuel cell stack 33, and the embodiment is kept at 0.1-0.3Mpa. Before the fuel cell stack 33 is operated, the coolant pump 32 and the cooler 31 are started to enhance heat dissipation during operation of the fuel cell stack 33. Meanwhile, the cathode side oxidant oxygen of the fuel cell stack 33 is supplied from air passing through the filter 38 and the air compressor 36 to ensure the raw material supply of the fuel cell stack 33 during operation. The unreacted gas is discharged from the exhaust valve 37 when the back pressure is equal to the external atmospheric pressure by the expansion machine 35 connected to the tail of the fuel cell power generation stack 33.
The electric vehicle charging system mainly comprises a DC-DC voltage converter 39, an energy storage battery 40 and a charging pile 41, wherein the charging pile 41 is a charging pile with double charging gun heads in the embodiment:
the DC-DC voltage converter 39 can match the power generation voltage of the fuel cell power generation stack 33 with the input voltage of the subsequent device, and the voltage transformation adjustment is performed according to the rated input voltage of the lithium battery. The lithium battery energy storage device 40 in this embodiment is used to stably output electric energy and store electric energy at a proper time. The electric energy output obtained by the oxidation-reduction reaction of the hydrogen and the oxygen in the fuel cell power generation stack 33 is unstable and has large fluctuation, and the input and output of the lithium battery energy storage device 40 can stabilize the current and the voltage, so that the electricity is ensured to be stably conveyed to the charging pile 41 according to the rated input voltage of the charging pile 41. The charging pile 41 with double gun heads is the last device connected with the client application end, the electric energy of the hydrogen fuel power generation system is matched with the rated power required by the charging of the electric automobile at the client end, and the proper output voltage is adjusted for the charging of the electric automobile.
In conclusion, the invention utilizes the ammonia decomposition hydrogen production method to supply fuel for the fuel cell, and has the characteristics of low cost and mature transportation technology; the hydrogen fuel cell is used for generating electricity to supply the electric energy to the charging pile system, and the charging pile system has the characteristics of zero pollution and zero carbon emission; the electric vehicle charging is not limited by the coverage of the power grid in remote areas or areas where the power grid is not easy to reach, so that the influence of inconvenience in charging on the whole popularization of the electric vehicle is avoided; meanwhile, the invention fundamentally avoids the use of traditional fossil energy and carbon emission, so the invention has wide application prospect.
It is emphasized that: the above embodiments are merely preferred embodiments of the present invention, and the present invention is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. Off-grid electric vehicle fills electric pile based on ammonia hydrogen conversion, its characterized in that includes: the system comprises an ammonia decomposition hydrogen production system, a hydrogen fuel power generation system and an electric vehicle charging system, wherein the ammonia decomposition hydrogen production system is used for decomposing liquid ammonia into hydrogen for the hydrogen fuel power generation system to generate power; the hydrogen fuel power generation system is used for generating electricity from the hydrogen generated by the ammonia decomposition hydrogen production system and providing the generated electricity to the electric vehicle charging system; the electric vehicle charging system is used for outputting electric energy provided by the hydrogen fuel power generation system to the electric vehicle for charging after voltage stabilization matching;
the ammonia decomposition hydrogen production system comprises: the ammonia gas purifying device comprises a liquid ammonia storage tank (1), a liquid ammonia pump (8), an ammonia decomposition reactor (12), a TSA device (15), a PSA device (16), a connecting storage tank (18), a hydrogen filling device (24), a hydrogen compression pump (25) and a hydrogen storage tank (26), wherein the ammonia decomposition reactor (12) is used for generating hydrogen after decomposing ammonia gas in a reaction manner; the liquid ammonia outlet of the liquid ammonia storage tank (1) is connected to the inlet of the liquid ammonia pump (8), the outlet of the liquid ammonia pump (8) is connected to the ammonia decomposition inlet of the ammonia decomposition reactor (12) after passing through an evaporation heat exchange device, the hydrogen outlet of the ammonia decomposition reactor (12) is sequentially connected to the hydrogen inlets of the TSA device (15) and the PSA device (16) after passing through a heat exchange condensing device, the hydrogen outlet of the PSA device (16) is connected to the hydrogen inlet of the connecting storage tank (18), the hydrogen outlet of the connecting storage tank (18) is connected to the hydrogen inlet of the hydrogen filling device (24) after passing through a cooling condensing device, and the hydrogen outlet of the hydrogen filling device (24) is connected to the hydrogen inlet of the hydrogen storage tank (26) after passing through the hydrogen compression pump (25) in series;
the hydrogen fuel power generation system includes: a hydrogen storage tank (26), a fuel cell power generation stack (33), an air compressor (36), a filter (38) and a DC-DC converter (39), wherein the fuel cell power generation stack (33) is used for generating electricity after burning hydrogen; the hydrogen outlet of the hydrogen storage tank (26) is connected to the hydrogen inlet of the fuel cell power generation stack (33), the air inlet of the fuel cell power generation stack (33) is also connected with the air outlet of the air compressor (36), the air inlet of the air compressor (36) is connected to the air outlet of the filter (38), the air inlet of the filter (38) is communicated to an external air source, and the power generation output port of the fuel cell power generation stack (33) is electrically connected to the DC-DC converter (39);
the electric vehicle charging system includes: a DC-DC converter (39), a lithium battery energy storage device (40) and a charging pile (41); the electric outlet of DC-DC converter (39) is electrically connected to lithium cell energy memory (40), lithium cell energy memory (40) electricity is connected to fill electric pile (41), fill and be equipped with the rifle head of charging on electric pile (41) and charge for the electric motor car.
2. Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that the evaporation heat exchange device between the outlet of the liquid ammonia pump (8) and the ammonia decomposition reactor (12) comprises: a second evaporator (9), a heat exchanger (11), the outlet of the liquid ammonia pump (8) is connected to the evaporation inlet of the second evaporator (9), the evaporation outlet of the second evaporator (9) is connected to the heat absorption inlet of the heat exchanger (11), and the heat absorption outlet of the heat exchanger (11) is connected to the ammonia inlet of the ammonia decomposition reactor (12); the heat exchange condensing device between the hydrogen outlet of the ammonia decomposition reactor (12) and the TSA device (15) is a heat exchanger (11) and a second evaporator (9) respectively, the hydrogen outlet of the ammonia decomposition reactor (12) is connected to the heat radiation inlet of the heat exchanger (11), the heat radiation outlet of the heat exchanger (11) is connected to the condensing inlet of the second evaporator (9), and the condensing outlet of the second evaporator (9) is connected to the hydrogen inlet of the TSA device (15).
3. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 2, wherein an air cooler (13) is further connected in series between a heat radiation outlet of the heat exchanger (11) and a condensation inlet of the second evaporator (9), and a second compressor (14) is further connected in series between a condensation outlet of the second evaporator (9) and a hydrogen inlet of the TSA device (15).
4. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that a stop valve (2) is further connected in series between a liquid ammonia output port of the liquid ammonia storage tank (1) and an inlet of the liquid ammonia pump (8), a first evaporator (4) is further connected at an outlet of the stop valve (2), an outlet of the stop valve (2) is connected to an evaporation inlet of the first evaporator (4), an evaporation outlet of the first evaporator (4) is connected to an inlet of a first compressor (6), an outlet of the first compressor (6) is connected to an inlet of the liquid ammonia storage tank (1), and a cooling condensing device between a hydrogen outlet of the storage tank (18) and a hydrogen inlet of the hydrogen filling device (24) is an absorption refrigerating device (23) and the first evaporator (4), a hydrogen outlet of the storage tank (18) is connected to an inlet of the absorption refrigerating device (23), an outlet of the absorption refrigerating device (23) is connected to a condensing inlet of the first evaporator (4), and a hydrogen filling inlet of the first evaporator (24) is connected to a condensing inlet of the hydrogen filling device (24).
5. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 4, wherein a throttling device (22) is further connected in series between the hydrogen outlet of the connecting storage tank (18) and the inlet of the absorption refrigeration device (23).
6. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, wherein the connecting storage tank (18) is respectively provided with a high-pressure storage tank (19), a medium-pressure storage tank (20) and a low-pressure storage tank (21).
7. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that a pressure regulating valve (30) is connected in series between a hydrogen outlet of the hydrogen storage tank (26) and a hydrogen inlet of the fuel cell power generation stack (33), an exhaust valve (28) is further arranged on the fuel cell power generation stack (33), a circulating pump (29) is further arranged between an inlet of the exhaust valve (28) and the pressure regulating valve (30), and a circulating direction of the circulating pump (29) is from the exhaust valve (28) to the pressure regulating valve (30).
8. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that a cooler (31) and a coolant pump (32) are further arranged on the fuel cell power generation pile (33), an inlet of the cooler (31) is connected to the fuel cell power generation pile (33), an outlet of the cooler (31) is connected to an inlet of the coolant pump (32), and an outlet of the coolant pump (32) is connected back to the fuel cell power generation pile (33).
9. The off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that a warmer (34) is further arranged on the fuel cell power generation stack (33), an air inlet of the fuel cell power generation stack (33) is connected to a warming outlet of the warmer (34), and a warming inlet of the warmer (34) is connected to an air outlet of an air compressor (36); the cooling inlet of the warmer (34) is connected to the exhaust port of the fuel cell power generation stack (33), and the cooling outlet of the warmer (34) is connected in series through an expander (35) and then is connected with a tail gas valve (37).
10. Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion according to claim 1, characterized in that the charging pile (41) is provided with at least two charging gun heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311107529.9A CN117124905A (en) | 2023-08-30 | 2023-08-30 | Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311107529.9A CN117124905A (en) | 2023-08-30 | 2023-08-30 | Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117124905A true CN117124905A (en) | 2023-11-28 |
Family
ID=88861021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311107529.9A Pending CN117124905A (en) | 2023-08-30 | 2023-08-30 | Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117124905A (en) |
-
2023
- 2023-08-30 CN CN202311107529.9A patent/CN117124905A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8272353B2 (en) | Apparatus for using ammonia as a sustainable fuel, refrigerant and NOx reduction agent | |
| CN113540541B (en) | SOFC (solid oxide Fuel cell) using ammonia water as fuel, and cascade power generation system and operation method thereof | |
| US7067211B2 (en) | Cogeneration system for a fuel cell | |
| CN114243056B (en) | Fuel cell system with energy recovery module | |
| CN102760900B (en) | Pressurized solid oxide fuel cell (SOFC)/ gas turbine (GT)/ air turbine (AT)/ steam turbine (ST) hybrid power system with zero release of CO2 which is combined with scavenging and integrated with optical terminal multiplexer (OTM) | |
| CN113889648B (en) | MW-level combined heat and power supply fuel cell power station | |
| CN111106364A (en) | Fuel cell power generation system | |
| CN117747887A (en) | Hydrogen/ammonia fuel energy system coupling fuel cell and gas turbine | |
| CN112003309B (en) | Electric power peak shaving system | |
| CN117810494A (en) | Ammonia fuel cell system and power generation method | |
| CN111942137A (en) | Hybrid power system for automobile, using method thereof and automobile using same | |
| CN117124905A (en) | Off-grid electric vehicle charging pile based on ammonia-hydrogen conversion | |
| KR102602831B1 (en) | Hybrid system of fuel cell | |
| CN109140227B (en) | Small LNG distributed energy system and process method | |
| WO2024119391A1 (en) | Renewable energy utilization system based on nitrogen-free combustion and carbon dioxide circulation | |
| CN116816636B (en) | Energy storage and gas storage system and method for coupling liquid air energy storage and air separation | |
| CN117124888A (en) | High-endurance ammonia-hydrogen fuel cell automobile | |
| CN220673403U (en) | Multi-energy co-supply system of data center | |
| DK181364B1 (en) | Device for supplying electricity to a unit in a vessel | |
| CN114976168B (en) | Electric heating oxygen production and supply system for power generation and ammonia electrochemical combined production and storage | |
| CN216389455U (en) | Ammonia hydrogen production system of hydrogen fuel cell | |
| CN115976539A (en) | Renewable energy utilization system based on nitrogen-free combustion and carbon dioxide circulation | |
| CN117013020B (en) | Fuel cell system coupled with heat pump and operation method thereof | |
| CN116995263A (en) | Fuel cell waste heat dehydrogenation system | |
| CN118065994A (en) | Low-temperature liquid carbon dioxide battery system applied to SOFC power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |